Half to james c



J. E. DAY.

(No Model.)

TUYERE.

Patented Apr. 4, 1882..

m Psreaa'mm-umu hu, Washington. n. c.

' UNITED STATES PATENT OFFICE.

JEREMIAH E. DAY, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF ONE- HALF TO JAMES C. AITKEN, OF SAME PLACE.

TUYERE.

SPECIFICATION forming part of Letters Patent No. 255,842, dated April 4, 1882.

Application filed January 10, 1882. (No model.)

To all whom it may concern:

Be it known that I, JEREMIAH E. DAY, of the city and county of San Francisco, State of California, have invented a Tuyere; and I hereby declare the following to be a full, clear,

and exact description thereof.

My invention relates to anew and useful tuyore for forges; and it consists in the construction and arrangement of the air-pipe in connection with a peculiar removable protectingcasting fitting upon said pipe and receiving the fire upon itself, said casting being provided with a removable grate immediately over the ventilating-hole in the pipe below, all

of which will hereinafter more fully appear, reference being made to the accompanying drawings.

Figure l is a perspective view. Fig. 2 is a longitudinal vertical section. Fig. 3 is a trans- 2o verse section.

The main object of my invention may be explained by noticing the present construction of forges with the tuyeres generally in use.

Any pipe which can be made to conduct air to the fire may be regarded as a tuyere, and in many cases the only tuyere used is a piece of pipe with a few holes cut in its top directly under where the fire is built. The objection to this is that, the fire being built upon the 0 pipe, it not only soon clogs up, but will burn out in a short while and become useless.

My object herein is to provide an inexpensivc tuyere made of a piece of pipe, in which the ventilation will be good and which will be 5 protected from burning out.

Let A represent a forge, and B a pipe of suitable "size, and preferably a common gaspipe. This pipe is led upon the forge from a suitable blower or bellows, and is carried 0 through and beyond the place where thefire is built, as shown. Its end is made airtight by the screw-cap O, which is adapted to be readily removed when required to blow out the pipe in order to clean it. In the pipe B,

5 upon its upper side, is made an aperture, 1).

Let I) represent a casting the inner circumference of which is just enough larger than the outer periphery of pipe B to allow it to fit down snugly and closely over said pipe,

as shown. This casting is made with a convex top, and is therefore thicker at the middle than at its ends. It is provided with a central aperture or grate-opening, d, which, when said castingis fitted upon thepipe, is directly over the opening I) in said pipe.

E represents a grate adapted to fit closely in the opening d. It con-forms to the general shape of the casting. This grate may have any suitable number of bars, andf being directlyover the opening bin the air-pipe, receives therefrom the proper draft. The fireis built upon the grate E and the casting D, and on account of the convex surface the ashes and clinkers are constantly slipping away from the grate and do not have a tendency to remain and drop through to clog the pipe. The fire will not affect the pipe 13, it being protected by the heavy casting 1).. This cast- .ing may be removed to substitute another for any purpose, as for the reception of a larger or smaller grate. I make them of different sizes to be adjusted to different pipes, and I may have the grates made of various sizes to accommodate them to the nature of the work when it requires more or less draft.

A point of advantage herein is in extending the air-pipc B beyond the tire and closing its end. The air, when forced into the pipe, reaches its whole extent and keeps that portion of the pipe beyond the fire cool. It acts as an air-chamber to increase the draft through the opening and keeps up a circulation, thus preventing the pipe from becoming as hot as it would werethe end to remain in the fire and the air escapetherefrom. It also allows greater 8 5 space for the small coals which drop through the grate to congregate before being blown out, and, lastly, it allows the cleaning to be done easily, for by removing the cap 0 the pipe B may be blown out and thoroughly cleaned.

Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent, is-- 1. A tuyere for a forge, consisting of the pipe B, with its closed end and aperture 1), and 5 theremovable casting D, fitting over said pipe and havinga convexnpper surface and a grateopening, d, and the removable grate E, fitting the opening d, substantially as herein deopening d, and the removable grate E, subscribed. stnntiall y as herein described. 2. A tuyere for a forge, consisting of the I In Witness whereof I hereunto set my hand. 10 pipe B, having an opening, I), and extending JEREMIAH E. DAY. 5 beyond the fire and closed by a screw-cap, O, Witnesses:

for the purpose specified, the removable cast- WM. F. BOOTH,

iug D, with its com'ex surface and grate- J. H. BLOOD. 

